Alert archive / Michigan / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 660
The Storm Prediction Center issued this severe thunderstorm watch at Aug 28, 2007, 5:49 PM EDT for Delta County, Dickinson County, Menominee County, Michigan. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 28, 2007, 5:49 PM EDT (21:49 UTC)
- Expired
- Aug 28, 2007, 7:58 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Delta County, MI, Dickinson County, MI, Menominee County, MI
The radar
The Marquette radar (KMQT), 94 km from the middle of the area, began a volume at 21:52 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 40%
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 5:49 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson, Menominee | 71 min |
| Aug 28, 6:33 PM EDT | Severe Thunderstorm Warning | MQT | Delta | 57 min |
| Aug 28, 6:57 PM EDT | Severe Thunderstorm Warning | MQT | Menominee | 18 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.8 hours before the alert went out and 152 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 386 J/kg
- Mixed-layer CIN
- -330 J/kg
- Mixed-layer LCL
- 1066 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 274 m²/s²
- 0-3 km storm-relative helicity
- 291 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 5:17 AM EDT | Severe Thunderstorm Watch | SPC | Menominee | 4 hr |
| Aug 28, 9:40 AM EDT | Mesoscale Discussion | SPC | Alcona, Alpena, Antrim, Benzie, Cheboygan, Crawford and 7 more | 35 min |
| Aug 28, 4:24 PM EDT | Mesoscale Discussion | SPC | Delta, Dickinson, Iron, Menominee, Schoolcraft | 66 min |
| Aug 27, 10:05 PM EDT | Mesoscale Discussion | SPC | Ashland, Bayfield, Douglas | 55 min |
| Aug 28, 2:50 AM EDT | Mesoscale Discussion | SPC | Barron, Dunn, Polk, Saint Croix | 55 min |
| Aug 28, 2:56 AM EDT | Severe Thunderstorm Watch | SPC | Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more | 3 hr |
| Aug 28, 4:48 AM EDT | Mesoscale Discussion | SPC | Chippewa, Clark, Dunn, Eau Claire, Forest, Langlade and 8 more | 87 min |
| Aug 28, 12:58 PM EDT | Mesoscale Discussion | SPC | Barron, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 24 more | 62 min |
| Aug 28, 1:15 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Barron, Brown, Buffalo, Calumet, Chippewa and 34 more | 8 hr |
| Aug 28, 7:04 PM EDT | Mesoscale Discussion | SPC | Crawford, Richland, Vernon | 3 hr |
| Aug 28, 7:28 PM EDT | Mesoscale Discussion | SPC | Adams, Brown, Calumet, Columbia, Crawford, Fond du Lac and 9 more | 62 min |
Nearby
Severe Thunderstorm Watches in Michigan, 2007Every severe thunderstorm watch in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.